| // Copyright 2023 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| #include "pw_system/transfer_handlers.h" |
| |
| namespace pw::system { |
| |
| TracePersistentBufferTransfer::TracePersistentBufferTransfer( |
| uint32_t id, TracePersistentBuffer& persistent_buffer) |
| : transfer::ReadOnlyHandler(id), |
| persistent_buffer_(persistent_buffer), |
| reader_({}) { |
| set_reader(reader_); |
| } |
| |
| Status TracePersistentBufferTransfer::PrepareRead() { |
| if (!persistent_buffer_.has_value()) { |
| return Status::Unavailable(); |
| } |
| |
| // As seeking is not yet supported, reinitialize the reader from the start |
| // of the snapshot buffer. |
| new (&reader_) stream::MemoryReader( |
| pw::ConstByteSpan{persistent_buffer_.data(), persistent_buffer_.size()}); |
| |
| return OkStatus(); |
| } |
| |
| } // namespace pw::system |
